Revert "bridge: Let bridge not age 'externally' learnt FDB entries, they are...

Revert "bridge: Let bridge not age 'externally' learnt FDB entries, they are removed when 'external' entity notifies the aging"

This reverts commit 9a05dde5.

Requested by Scott Feldman.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/bridge/br_fdb.c

@@ -280,7 +280,7 @@ void br_fdb_cleanup(unsigned long _data)
 
 		hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
 			unsigned long this_timer;
-			if (f->is_static || f->added_by_external_learn)
+			if (f->is_static)
 				continue;
 			this_timer = f->updated + delay;
 			if (time_before_eq(this_timer, jiffies))